A 58-year-old bicyclist is dead after being struck by a semi-truck Saturday on Mamalahoa Highway near Hau Lane and Pukihae Street, just north of Hilo. Witnesses say the bicyclist hit the sidewalk curb, fell over and was struck by the Hilo-bound truck around 8:45 a.m. The cyclist died at the scene.

The trucks driver, identified as a 66-year old Hilo man was uninjured. Police have opened up a first-degree negligent homicide investigation.